Introduction to electricity 1

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INTRODUCION to

Ignacio Anguera de Sojo

ELECTRICITY I

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electric

charge and

static

electricity

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electric charge and static electricityA little of history…

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electric charge and static electricity

Amber Elektron Electricity

A little of history…

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electric charge and static electricityElectric Charge

All matter is made of atoms

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electric charge and static electricityElectric Charge

All matter is made of atoms

Atoms are made of smaller particles called:

Protons Neutrons Electrons

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electric charge and static electricityElectric Charge

All matter is made of atoms

Atoms are made of smaller particles called: Protons (p+) positive charge Neutrons (nº) no charge Electrons (e-) negative charge

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electric charge and static electricityLaw of Electric Charge

Charged objects exert a force –repel or attract- on other charged objects

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electric charge and static electricityLaw of Electric Charge

Same charge Repulsion

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electric charge and static electricityLaw of Electric Charge

Same charge Repulsion

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electric charge and static electricityLaw of Electric Charge

Same charge Repulsion

Different charge Attraction

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electric charge and static electricityElectric Force & Electric

Field Electric Force: force between two charged objects

Depends on: Distance Amount of charge

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electric charge and static electricityElectric Force & Electric

Field Electric Force: force between two charged objects

Electric Field: area around a charged object in which another charged object experiment an electric force

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electric charge and static electricity

1. What three types of charge can an object have?

2. What does the law of electric charges state?

3. The force between charged objects is a(n)

___________________.

4. What two things affect the size of the electric force?

5. The region around a charged object where an electric force

is exerted on another charged object is the

____________________.

6. How do charged objects within an electric field interact?

10 minutes to answer the following questions:

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electric charge and static electricityCharge It!

No charge: object with the same number of protons and electrons (p+ = e-)

Positive charge: it loses electrons (p+ > e-)

Negative charge: it gains electrons (p+ < e-)

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electric charge and static electricityCharge It!

Friction: electrons are wiped form one object to another.

Three ways for charging an object:

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electric charge and static electricityCharge It!

Friction: electrons are wiped form one object to another. Conduction: electrons move from one object to another

Three ways for charging an object:

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electric charge and static electricityCharge It!

Friction: electrons are wiped form one object to another. Conduction: electrons move from one object to another Induction: charges in an uncharged metal object are rearranged without direct contact

Three ways for charging an object:

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electric charge and static electricityElectroscope:

Detect presence of electric charge

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electric charge and static electricityElectroscope:

Detect presence of electric charge

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electric charge and static electricityHair rising:

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electric charge and static electricity

1. Why are atoms uncharged?

2. What happens when an object loses electrons?

3. What happens when an object gains electrons?

4. When you charge objects by any method, no charges are

______________________ or ______________________.

5. Can you tell if an object has a positive or negative charge

with an electroscope?

10 minutes to answer the following questions:

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electric charge and static electricityLabel the following pictures as examples of

conduction, induction, friction, or electric discharge

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electric charge and static electricity

The image shows two charged balloons. Use the image to answer the questions that follow.

1.- Do the balloons have the same charge or opposite charges?

2.- How would the image look if each balloon were given the charge opposite to the charge it has now?

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electric charge and static electricityMoving Charges!

Moving charges → Pg. 204• Conductors• Insulators

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electric charge and static electricityMoving Charges!

Conductors: Charges can move easily. Ex. Copper, aluminum. Insulators: Charges cannot move easily. Ex: Plastic, rubber, glass.

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electric charge and static electricityMoving Charges!

Conductors: Charges can move easily. Ex. Copper, aluminum. Insulators: Charges cannot move easily. Ex: Plastic, rubber, glass.

Which is the difference between electric conductors and insulators?

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electric charge and static electricityMoving Charges!

Conductors: Charges can move easily. Ex. Copper, aluminum. Insulators: Charges cannot move easily. Ex: Plastic, rubber, glass.

Which is the difference between electric conductors and insulators?

Warning! Do not use electric hair dryer when you are wet cause you can suffer an electric shock!

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electric charge and static electricityMoving Charges!

Conductors: Charges can move easily. Ex. Copper, aluminum. Insulators: Charges cannot move easily. Ex: Plastic, rubber, glass.

Which is the difference between electric conductors and insulators?

Warning! Do not use electric hair dryer when you are wet cause you can suffer an electric shock!

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electric charge and static electricityMoving Charges!

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electric charge and static electricityStatic electricity!

Static electricity→ Pg. 204• Electric

Discharge• Lightning

Dangers• Lightning Roads

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electric charge and static electricityStatic electricity!

Static electricity: electric charge at rest; generally produced by friction or induction.Electric Discharges: when electric charges stored in a source move off. Ex: Lightning

What is static electricity and how it happens?

When I walk on a nylon carpet I become 'charge up' because of friction.

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electric charge and static electricityStatic electricity!

Static electricity: electric charge at rest; generally produced by friction or induction.Electric Discharges: when electric charges stored in a source move off. Ex: Lightning

What is static electricity and how it happens?

When I walk on a nylon carpet I become 'charge up' because of friction.

P: 555.123.4568 F: 555.123.4567123 West Main Street, New York, NY 10001

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electric charge and static electricityStatic electricity!

Static electricity: electric charge at rest; generally produced by friction or induction.Electric Discharges: when electric charges stored in a source move off. Ex: Lightning

What is static electricity and how it happens?

When I walk on a nylon carpet I become 'charge up' because of friction.

P: 555.123.4568 F: 555.123.4567123 West Main Street, New York, NY 10001

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electric charge and static electricityStatic electricity!

Static electricity: electric charge at rest; generally produced by friction or induction.Electric Discharges: when electric charges stored in a source move off. Ex: Lightning

What is static electricity and how it happens?

When I walk on a nylon carpet I become 'charge up' because of friction.

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Static electricity!

Lightning: electric charge at rest; generally produced by friction or induction.Electric Discharges: the loose of electric charges stored in a source. Ex: Lightning

electric charge and static electricity

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Static electricity!

electric charge and static electricity

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Static electricity!

electric charge and static electricity

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electric charge and static electricityLightning Rods